The simple circular notched specimen was originally proposed by Arcan to characterize the elastic properties of fiber-reinforced composites. Unfortunately, its optimized geometry does not allow to measure with reasonable accuracy both the material shear strength and the conditions of failure under a generic biaxial stress state, since the effects of stress concentration on the fillets of the two V-grooves and on the inner circular edges are responsible of premature fractures due to the uniaxial stress states of the notches edges. To improve the performance of this kind of specimen, an extensive FEM analysis has been carried out by a two-dimensional parameterized model, in order to identify those geometries that make possible the fracture to occur in the minimum strength section under the action of a uniform pure shear stress state. Furthermore, the parametric analysis has been extended to the 3D field to define alternative geometries, having variable thickness, that are able to produce with an higher probability material fracture in the minimum strength section.

Specimen for Fracture Characterization of Material under Biaxial Stress Fields / Pucillo, Giovanni Pio; Grasso, Marzio; Penta, Francesco; Pinto, Paolo. - (2010), pp. 707-714. (Intervento presentato al convegno ICFM 9 - 9th International Conference on Multiaxial Fatigue & Fracture tenutosi a Parma, Italy nel 7th-9th June 2010).

Specimen for Fracture Characterization of Material under Biaxial Stress Fields

PUCILLO, Giovanni Pio;GRASSO, MARZIO;PENTA, FRANCESCO;PINTO, PAOLO
2010

Abstract

The simple circular notched specimen was originally proposed by Arcan to characterize the elastic properties of fiber-reinforced composites. Unfortunately, its optimized geometry does not allow to measure with reasonable accuracy both the material shear strength and the conditions of failure under a generic biaxial stress state, since the effects of stress concentration on the fillets of the two V-grooves and on the inner circular edges are responsible of premature fractures due to the uniaxial stress states of the notches edges. To improve the performance of this kind of specimen, an extensive FEM analysis has been carried out by a two-dimensional parameterized model, in order to identify those geometries that make possible the fracture to occur in the minimum strength section under the action of a uniform pure shear stress state. Furthermore, the parametric analysis has been extended to the 3D field to define alternative geometries, having variable thickness, that are able to produce with an higher probability material fracture in the minimum strength section.
2010
9788895940311
Specimen for Fracture Characterization of Material under Biaxial Stress Fields / Pucillo, Giovanni Pio; Grasso, Marzio; Penta, Francesco; Pinto, Paolo. - (2010), pp. 707-714. (Intervento presentato al convegno ICFM 9 - 9th International Conference on Multiaxial Fatigue & Fracture tenutosi a Parma, Italy nel 7th-9th June 2010).
File in questo prodotto:
File Dimensione Formato  
ICMFF9 Paper N 113 (Penta-UNINA).pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Accesso privato/ristretto
Dimensione 1.19 MB
Formato Adobe PDF
1.19 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/368663
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact